Pavement for roads and streets



0. H. PUBCELL AND L. 1. HEWES.

PAVEMENT FOR ROADS AND STREETS.

Patented Oet'll, 1921.

2 SHEETS-SHEET 1.

APPLICATION FILED MAR-1, 1921.

CE I VENTOR BYR W A TTORNE Y C. H. PURCELL AND L. I. HEWES.

PAVEMENT FOR ROADS AND STREETS.

APPLICATION FILED MAR. I, 1921.

1,393,699, Patented Oct. 11, 1921.

2 SHEETSSHEET 2.

A TTORNE Y UNITED sTAT Es PATENT OFFICE.

CHARLES E PUBOELL ANI J LAURENCE I. HEWES, OI PORTLAND, OREGON.

PAVEMENT FOR ROADS AND STREETS.

Specification 61 Letters Patent. P t t t, 19

Application filed March 1, 1921.

Serial No. 448,849.

111.31) mums. ran ACT or-rncn a, 1883, 22 sum. 1., M.

T all whom it may concern:

Be it known that we, CHARLES H. PURCELL and LAURENoE I. Hnwns, citizens of the United States, and employees of the Department of Agriculture, residing in Portland, in the county of Multnomah and State of Oregon, have invented a new and useful Pavement for Roads and Streets, of which March 3, 1883, chapter 143 (22 Stat., 625),-

the following is a specification.

This application is made under the act of and the invention herein described and claimed may be used by the Government of the United States, its oflicers and employees, and by any person. in the United .States without payment to us of any royalty thereon. We hereby dedicate the same to the free use of the Government and the people of the United States.

Our invention relates to that type of construction to which slabs are manufactured separately and subsequently deposited on the subgrade adjacent to each other thus forming. the pavement. The objects of the invention are: first, to provide a practicable method of constructing a pavement where natural conditions make it diificult and expensive to construct the pavement in place on the subgrade; second, to make it possible to construct a pavement which can be used immediately on com letion thus avoiding interference with tra '0; third, to provide a method by which the pavement is conin which Figure 1 is a top view of portions of three slabs; Fig. 2 a vertical section of same; Fig. 3'an isometric view of (ads of panel; Fig. 4 a connection detail and ig. 5 an isometric view of same. i Similar figures refer to Similar parts throughout.

the method to give a uniform bearing for the slabs.

Adjacent slabs are held together by connections consisting of U bars 5 and rods 6 which are driven through openings formed by grooves 7 and through loops 8 formed by U bars'5. The recess 9 serves to allow for the projecting loops of U 'bar embedded in adjacent slab.- The joints 10 between slabs.

ma be filled with material poured in after sla s are in place and rods 6 driven in place. A suitable number of the joints ma be filled with bitumen allowing for expansion of the slabs. A cushion 11 consisting of sand and cement may be placed under each expansion 'oint. After the slabs are well bedded, but

efore the bitumen is poured, water may be poured on the sand and cement cushion, forming grout.

It is to be understood that we do not limit ourselves to the form of the invention here shown for the purposes'of illustration ex cept as we may be limited by the following claims forming a part hereof:

We claim 1. The combination of a precast slab of paving material and a connection with an adjacent slab, such connection consisting of overla ping U bars and a r l passing throug the loops formed by the U bars and grooves in the slabs substantially as described.

2. The combination of a precast slab of paving material and a connection withan adjacent slab, such connection consisting of overlapping U bars, a rod passing through CHARLES H. PURGELL. LAURENCE I.- HEWES; 

